Low-distortion optical system and lens

An optical system and lens technology, applied in the field of low-distortion optical systems and lenses, can solve the problems of high distortion and relative illuminance of the lens, and achieve the effect of low distortion and high relative illuminance

Pending Publication Date: 2021-07-13
HUNAN CHIOPT OPTICAL TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the present invention proposes a low-distortion optical system and lens, which can solve the problems of high distortion and low relative illuminance of existing lenses

Method used

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  • Low-distortion optical system and lens
  • Low-distortion optical system and lens
  • Low-distortion optical system and lens

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Embodiment Construction

[0047] The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, only used to explain the present invention, and should not be construed as a limitation of the present invention.

[0048] In the description of the present invention, it should be understood that the azimuth description, such as the azimuth or position relationship indicated by up, down, front, rear, left, right, etc., is based on the azimuth or position relationship shown in the drawings, only In order to facilitate the description of the present invention and simplify the description, it is not indicated or implied that the indicated device or element must have a particular orientation, be construc...

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Abstract

The invention discloses a low-distortion optical system and a lens, and the optical system comprises a first lens having positive focal power, a second lens having negative focal power and arranged at intervals relative to the first lens, a third lens, a diaphragm, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and a photosensitive chip which are sequentially arranged from an object side to an image side, wherein the third lens has negative focal power, and the third lens and the second lens are arranged at intervals; the diaphragm and the third lens are arranged at intervals and the diaphragm is used for limiting the aperture of the light beam; the fourth lens has positive focal power, and the fourth lens and the diaphragm are arranged at intervals; the fifth lens has negative focal power, and the fifth lens and the fourth lens form a cemented lens; the sixth lens has positive focal power, and the sixth lens and the fifth lens are arranged at an interval; the seventh lens has positive focal power, and the seventh lens and the sixth lens are arranged at intervals; and the photosensitive chip and the seventh lens are arranged at intervals, and the photosensitive chip is used for capturing an imaging signal and forming an image. By arranging lens combinations of different structures and reasonably distributing the focal power of each lens, low distortion and high relative illumination of the optical system are realized while high-definition resolution is obtained.

Description

technical field [0001] The invention relates to the technical field of optical lenses, in particular to a low-distortion optical system and a lens. Background technique [0002] Due to its relatively low cost and high resolution, fixed-focus lenses are widely used in the field of surveillance. At present, the market has higher and higher specifications and performance requirements for fixed-focus surveillance lenses, such as meeting high-definition resolution capabilities, up to 4K and above; low distortion; high relative illumination; For high relative illuminance, most of the products on the market currently use lens structures containing plastic aspherical lenses. However, the plastic aspherical lenses themselves have the problems of easy aging and poor stability. SUMMARY OF THE INVENTION [0003] The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the present invention proposes a low-distortion optical syst...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00
CPCG02B13/0015G02B13/006
Inventor 韦义壮罗吉祥时爽王朵久
Owner HUNAN CHIOPT OPTICAL TECH
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